We pick e.root-servers.net, one of the 13 root servers (1), and ask it about perdanamail.um.edu.my and learn that my is delegated to six name servers (2), so we ask ns30.cdns.net where we learn that edu.my is delegated to five name servers, including dns1.mynic.net.my (3), so we ask that one and learn that um.edu.my is delegated to three name servers (4), so we ask ns2.um.edu.my and get the following answer: